The most common and most likely answer to this crossword clue is the 8 letter word ARMAMENT
I've seen this crossword clue in Financial Times
A
R
M
A
M
E
N
T
More clues leading to the result ARMAMENT
- Military preparation of Frenchman the last word in craft
- Mail intended reporting weapons
- Military force works to contain Frenchman having last word
- Member with makeshift team protecting new weaponry
- A fighting group having the last word to get the latest in excellent equipment
- Munitions are not put outside back of barrack-room in the morning
- Weaponry for a mother trapped in lease
- Karma men take in for defence
- Embarrassment breaks out as riotous Serbs drop weaponry
- Tamer man involved in making weaponry
Buddy explains!

The straight part
We know that "weapons" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case weapons = armament.The cryptic/wordplay part
In cryptic crossword there's often an wordplay/cryptic part as well.This part involves a more complex hint, such as an anagram, homophone, hidden word, etc.
Sadly, We don't have an explanation for this specific crossword clue yet.
What does ARMAMENT mean?
ARMAMENT noun- A body of forces equipped for war.
- All the cannon and small arms collectively, with their equipments, belonging to a ship or a fortification.
- Any equipment for resistance.
- The process of building up military capacity.